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Law Incorporation [45]
2 years ago
6

Which of these is the ionic compound?

Chemistry
1 answer:
ale4655 [162]2 years ago
5 0

Answer:

RbF

mgo

nh4cl

because electrons are lost by and element forming a cation and gained by the other element forming an anion and held together by electrostatic forces

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A segment of DNA that codes for the ability to make one type of protein molecule is known as what ?
ahrayia [7]
The answer is a gene
7 0
3 years ago
Please help me it's due tmrw ​
Advocard [28]

Answer:

A: The first one because it is going upward and that means getting warmer.

B: The second one is the cooling curve because it is going downward and that means cooler.

Explanation:

I hope this helps.

4 0
2 years ago
Find q when 22.0g of water is heated from 17.0 degrees Celsius to 100 degrees Celsius
Hatshy [7]

Answer:

When 22.0 g of water is heated from  17 °C  to 100 °C what amount of heat absorbed?

When 22.0 g of water is heated from  17 °C  to 100 °C  water absorbed   7643.64 j heat.

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Given data:

Mass of water = 22.0 g

Initial temperature = 17°C

Final temperature = 100°C

Solution:

ΔT  = T₂ -T₁

ΔT  = 100°C - 17 °C= 83°C

Q = m.c. ΔT

Q = 22 g× 4.186 j/g °C × 83 °C

Q = 7643.64 j

It means water require more heat which is  7643.64 j to increase its temperature from 17  °C to 100  °C .

8 0
3 years ago
Sodium oxide decomposes to produce oxygen gas and sodium metal
AlexFokin [52]

Answer:

2Na2O (s) → 4Na (s) + O2 (g)

Explanation:

According to this question sodium oxide, Na2O, decomposes to produce oxygen gas, O2, and sodium metal, Na. The following represents the chemical equation;

Na2O (s) → Na (s) + O2 (g)

However, the above chemical equation is not balanced as the number of atoms of each element on both sides are not equal e.g. there are 2 moles of Na on one side and 1 mole on the other.

To balance the equation, we make use of coefficients to ensure that the atoms of each element on the reactant side are the same as that on the product side. The balanced equation is as follows:

2Na2O (s) → 4Na (s) + O2 (g)

7 0
2 years ago
A student determines that the mass of a sample of aluminum is 8.3 g. How many moles are in the sample?
Luden [163]

Answer:

0.307

Explanation:

use the formula of n=mass /molar mass

5 0
2 years ago
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